Have you ever seriously thought where water poured out into the sink or flushed into the toilet flows? And what happens to leftover food and our waste products which disappear in pipes? Even if you haven't, you've probably heard at least something of treatment facilities and maybe know that during the

cleaning process silt is obtained, which is then used for producing gas! Today we'll visit the Kuryanovsky water treatment plant in the south of Moscow and trace the way of sewage "from pipe to pipe". We'll also visit a mini thermoelectric plant running on biogas produced from silt.

Even the ancient Greeks believed that substance consists of tiny particles called atoms. The word "atom" means "indivisible" in Greek. However, with the development of science, it became clear that neither an atom, nor a proton and neutron are truly elementary particles. They consist of the

smaller ones - quarks. Then neutrinos and antiprotons were discovered and now science knows about 400 different particles. To study their qualities and structures the mankind invented a very smart device - a collider. Let's look at some of them and learn how they function.

On November 20, 2004 one Russian guy, Vitaly Kulikov, set a new world record for highest ever flight. He reached a height of 5470 m on a bunch of 800 toy balloons filled with helium. Thus, Vitaly broke the record of three years ago belonging to Ian Ashpole and included in the Guinness Book of Records. The Englishman managed to reach a height of only 3350 m. Besides,

he couldn't land his "aircraft" and had to use a parachute. Kulikov's flight was a greater success, even though it took place in really extreme conditions - a terrible blizzard struck on that day. The wind speed near the ground was more than 160 km/h. Even planes don't fly in such weather. They are simply blown away from the strip...